CS206513B1 - Jet for liquid dispersion by gas - Google Patents

Description

The invention relates to a nozzle for dispersing a liquid with a gas.

In most technologically important processes where it is expedient or necessary to disperse the liquid with gas, eg spray painting, air humidification, suspension drying, evaporation of solutions, combustion of liquid fuels, the ratio of liquid to gas mass flow rates is so high that achieving a liquid dispersion regime gas from the nozzle does not require a special design solution. Therefore, due to the design of the nozzles for dispersing liquids with a small amount, i.e. with a gas to liquid ratio of less than 10: 1, due attention has not been paid. For small flow rates, up to 0.03 kg s ^{* 1} , simple cone nozzles with a circular gas outlet slot can be used for dispersion, which are usable, for example, according to the author's certifications of the Czechoslovak Socialist Republic No. 194 862 and 196 858, even at 1:10 ratio. the mass flow rate of gas to liquid. Since these simple conical nozzles are no longer capable of uniformly dispersing all of the liquid at flow rates exceeding 0.03 kg s ^{-1 of} liquid, a nozzle with an annular slot was designed to disperse the liquid with a small amount of gas, which according to the CSSR author's certificate. 196068 proved to be suitable for laboratory experiments in the flow rates from 0.06 kg s ^- kapaliny of liquid and 0.006 kg s of gas. This nozzle has a major design problem, especially in mass production, the requirement of a constant width of the annular gap over the entire circumference of the nozzle, which can be achieved only at very precise centering of the circular inner diaphragm relative to the inner circular circumference of the outer circumference. nozzle housing or nozzle head. Compliance with this requirement, which can in principle be satisfied in any design of individually handmade prototypes by matching the entire nozzle assembly, can only be ensured in series production by the special design of the nozzle as a whole.

The above-mentioned drawbacks are eliminated by the gas dispersion nozzle according to the invention, which consists of an inner stem, an end cap and a nozzle body, wherein the inner cap and end cap are centered on one another by conical contact surfaces of the same conicity. The nozzle according to the invention meets the requirements for series production of nozzles for liquid dispersions with a small amount of gas, while maintaining the necessary accuracy requirements for a constant width of the annular slot. The essence is the centering of the inner orifice to the nozzle end head by conical contact surfaces.

The advantage of this solution is easy disassembly and assembly during cleaning of the nozzle, interchangeability of standardly manufactured internal orifice plates or end heads, as well as the possibility of producing nozzles with the necessary precision of the annular slot of high-alloy steel. Standard manufacturing techniques for cutting Morse cones can be advantageously used.

Two examples of embodiments of a nozzle according to the invention are shown in the attached figures.

FIG. 1 shows an embodiment of a nozzle in which the inner diaphragm 1 is centered with respect to the nozzle body 2 by conical faces of the same conicity after being tightened by the end head Z to the nozzle body 3. FIG. 2 shows another embodiment of the nozzle in which the end head 2 is in turn attracted to the nozzle body 1 by the inner orifice 1 in the same centering method.

The nozzles according to the invention can advantageously be used for the large-scale ammonia-containing ammonia in the production of artificial nitric-phosphorus-potassium fertilizers.

Claims (1)

SUBJECT OF THE INVENTION Gas dispersing nozzle, characterized in that it consists of an inner orifice (1), an end cap (2) and a nozzle body (3), wherein the inner orifice (1) and the end cap (2) are centered to each other by conical contact surfaces of the same conicity.